18:00HP Lovecraft - At the Mountains of MadnessEpisode 3BBC Radio 4 Extra Duration: 30 minutes Wed 19th Aug 2015, 18:00 on BBC Radio 4 ExtraDyer and student geologist Danforth discover sprawling evidence of an incredible ancient civilisation. Read by Richard Coyle.GenresDramaHorror & SupernaturalSeriesHP Lovecraft - At the Mountains of Madness Source: BBC Online